<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form>
        firstName: <input type="text" name="firstName">
        <br>
        lastName:  <input type="text" name="lastName">
    </form>
    <form>
        username: <input type="text" name="username">
        password: <input type="password" name="password">
    </form>
    <form action="url" method="get" name="input">
        username: <input type="text" name="username">
        <input type="submit" value="登陆">
    </form>

</body>
</html>